Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas

Interaction between a quasi-stable stationary MHD mode and a tongue-shaped deformation is observed in the toroidal plasma with energetic particle driven MHD bursts. The quasi-stable stationary 1/1 MHD mode with interchange parity appears near the resonant rational surface of q = 1 between MHD bursts...

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Autores principales: Ida, K., Kobayashi, T., Yoshinuma, M., Akiyama, T., Tokuzawa, T., Tsuchiya, H., Itoh, K., Itoh, S.-I.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5809513/
https://www.ncbi.nlm.nih.gov/pubmed/29434239
http://dx.doi.org/10.1038/s41598-018-21128-z
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author Ida, K.
Kobayashi, T.
Yoshinuma, M.
Akiyama, T.
Tokuzawa, T.
Tsuchiya, H.
Itoh, K.
Itoh, S.-I.
author_facet Ida, K.
Kobayashi, T.
Yoshinuma, M.
Akiyama, T.
Tokuzawa, T.
Tsuchiya, H.
Itoh, K.
Itoh, S.-I.
author_sort Ida, K.
collection PubMed
description Interaction between a quasi-stable stationary MHD mode and a tongue-shaped deformation is observed in the toroidal plasma with energetic particle driven MHD bursts. The quasi-stable stationary 1/1 MHD mode with interchange parity appears near the resonant rational surface of q = 1 between MHD bursts. The tongue-shaped deformation rapidly appears at the non-resonant non-rational surface as a localized large plasma displacement and then collapses (tongue event). It curbs the stationary 1/1 MHD mode and then triggers the collapse of energetic particle and magnetic field reconnection. The rotating 1/1 MHD mode with tearing parity at the q = 1 resonant surface, namely, the MHD burst, is excited after the tongue event.
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spelling pubmed-58095132018-02-15 Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas Ida, K. Kobayashi, T. Yoshinuma, M. Akiyama, T. Tokuzawa, T. Tsuchiya, H. Itoh, K. Itoh, S.-I. Sci Rep Article Interaction between a quasi-stable stationary MHD mode and a tongue-shaped deformation is observed in the toroidal plasma with energetic particle driven MHD bursts. The quasi-stable stationary 1/1 MHD mode with interchange parity appears near the resonant rational surface of q = 1 between MHD bursts. The tongue-shaped deformation rapidly appears at the non-resonant non-rational surface as a localized large plasma displacement and then collapses (tongue event). It curbs the stationary 1/1 MHD mode and then triggers the collapse of energetic particle and magnetic field reconnection. The rotating 1/1 MHD mode with tearing parity at the q = 1 resonant surface, namely, the MHD burst, is excited after the tongue event. Nature Publishing Group UK 2018-02-12 /pmc/articles/PMC5809513/ /pubmed/29434239 http://dx.doi.org/10.1038/s41598-018-21128-z Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Ida, K.
Kobayashi, T.
Yoshinuma, M.
Akiyama, T.
Tokuzawa, T.
Tsuchiya, H.
Itoh, K.
Itoh, S.-I.
Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas
title Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas
title_full Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas
title_fullStr Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas
title_full_unstemmed Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas
title_short Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas
title_sort trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5809513/
https://www.ncbi.nlm.nih.gov/pubmed/29434239
http://dx.doi.org/10.1038/s41598-018-21128-z
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